After-hours buzz: ROST, GPS, AMAT & more

A trader works on the floor of the New York Stock Exchange (NYSE) on August 24, 2015 in New York City.

Check out which companies are making headlines after the bell:

Shares of Ross Stores skyrocketed more than 10 percent in extended trading Thursday after the clothing outlet beat expectations on its second-quarter earnings. The company reported bottom-line profits of 82 cents per share on revenue of $3.43 billion.

Gap stock soared more than 10 percent in after-hours trading after the clothing company posted easily topped expectations in its second-quarter earnings report. The company's bottom-line earnings of 68 cents per share trounced Reuters estimates of 52 cents; the company reported revenue of $3.8 billion.

Shares of Electronic Arts fell more than 1 percent in extended trading. The video game giant was downgraded to a "hold" rating from a "buy" by Zacks Investment Research, weekherald.com reported on Thursday.